CA1155784A - Device for influencing stretching and direction of displacement of a belt moving in its direction of the length during operation - Google Patents
Device for influencing stretching and direction of displacement of a belt moving in its direction of the length during operationInfo
- Publication number
- CA1155784A CA1155784A CA000382466A CA382466A CA1155784A CA 1155784 A CA1155784 A CA 1155784A CA 000382466 A CA000382466 A CA 000382466A CA 382466 A CA382466 A CA 382466A CA 1155784 A CA1155784 A CA 1155784A
- Authority
- CA
- Canada
- Prior art keywords
- belt
- rollers
- displacement
- roller
- during operation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H23/00—Registering, tensioning, smoothing or guiding webs
- B65H23/02—Registering, tensioning, smoothing or guiding webs transversely
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G39/00—Rollers, e.g. drive rollers, or arrangements thereof incorporated in roller-ways or other types of mechanical conveyors
- B65G39/10—Arrangements of rollers
- B65G39/12—Arrangements of rollers mounted on framework
- B65G39/16—Arrangements of rollers mounted on framework for aligning belts or chains
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/10—Handled articles or webs
- B65H2701/13—Parts concerned of the handled material
- B65H2701/132—Side portions
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structure Of Belt Conveyors (AREA)
Abstract
ABSTRACT
Device for influencing stretching and direction of displace-ment of a belt moving in its direction of the length during operation.
A device for influencing stretching and direction of displace-ment of a belt moving in its direction of length during operation, com-prising at least one set of rollers, one of which extends above and the other below the belt, at least one of them being displaceable with res-pect to the belt under the action of signals derived from the stretch and the direction of displacement of the belt, whilst viewed in the direction of displacement of the belt the two rollers of said set are located one behind the other, and at least one set of rollers is arranged on both sides of the belt in a manner such that between each set of rollers a peripheral part of the belt moves along an S-shaped bend.
Device for influencing stretching and direction of displace-ment of a belt moving in its direction of the length during operation.
A device for influencing stretching and direction of displace-ment of a belt moving in its direction of length during operation, com-prising at least one set of rollers, one of which extends above and the other below the belt, at least one of them being displaceable with res-pect to the belt under the action of signals derived from the stretch and the direction of displacement of the belt, whilst viewed in the direction of displacement of the belt the two rollers of said set are located one behind the other, and at least one set of rollers is arranged on both sides of the belt in a manner such that between each set of rollers a peripheral part of the belt moves along an S-shaped bend.
Description
115~784 Device for influencing stretching and direction of displacement of a belt movlng in its ~irection of length during operation.
The invention relates to a device for influencing stretching and direction of displacement of a belt moving in its direction of length during operation and provided with at least one set of rollers, or.e of which extends above and the other below the belt and at least one of which is dSsplaceable with respect to the belt under the action of signals derived from stretching and direction of displacement of the belt, whilst viewed in the direction of displacement of the belt the two rollers of said set are located one behind the other.
From German Patent Applications 1,481,178, 1,625,148 and
The invention relates to a device for influencing stretching and direction of displacement of a belt moving in its direction of length during operation and provided with at least one set of rollers, or.e of which extends above and the other below the belt and at least one of which is dSsplaceable with respect to the belt under the action of signals derived from stretching and direction of displacement of the belt, whilst viewed in the direction of displacement of the belt the two rollers of said set are located one behind the other.
From German Patent Applications 1,481,178, 1,625,148 and
2,501,489, laid out for public inspection such devices are known for influencing the direction of displacement of a belt moving in its direc-tion Or length during operation, the rollers covering the whole width of the belt and being supported on both sides of said belt. With the aid of this known device the direction of displacement of the belt can be acted upon during operation. However, when belt-shaped materials of, for example, cloth or tissue, such as endless filter belts, endles~s coveyor belts and the like are guided along rollers or other supports, folds of the belt material are frequently formed. Such folds are generally not '~
.
permitted for the de3ired optimum operation of the belt but such folds cannot be avoided when the aforesaid, known constructions are employed.
Besides, fron German Patent 2,304,37~ a device is known which comprises sets of rollers disposed so that the rotary axes of the rollers on one set are located in a plane at least .substantially at right angles to the belt material, whilst the belt can be pinced between the two rollers The rotary axes of the rollers are at an angle differing from 90 to the direction of length of the belt.
During operation the belt is clamped in between the rollers with a force depending on the stretch and~or the direction of displacement 1n of the belt-If, for example, a belt tends to deflect to a given side,a signal derived from the displacement of the belt will cause a decrease in clamping force exerted by the set of rollers on the side concerned I
and increase in clamping force of the set of rollers located on the oppo-1~ site side of the belt so that the latter set of rollers will drawthe belt back into the intended path of the belt. With the aforesaid inclined disposition of the rollers they can at the same time exert a spreading effecton the belt for eliminating any folds formed in the belt.
A disadvantage of the use of such pincing rollers is that 2~ fairly high local loads may occur in the belt, particularly when the edge of the belt is not completely flat, but provided, for example, with a turn-over. Particularly in the case of a belt having a turn-over thickness differences occur across the direction of length of the belt so that irregular local wear of the pincing rol]ers and/or of the rim of the belt itself is involved.
Viewed in the direction of length of the belt such pincing rollers al90 produce a locally heavy load, which give rise to disengagement of the rim,ravelling of the cloth and even to tear of the cloth in the longitudinal direction.
A furt~er disadvantage is that in eliminating lateral movements of the belt the pincing force of the rollers arranged on both sides of the belt is frequently fully suppressed so that locally no tractive force is any longer exerted on the belt, which may give rise to the formation of folds.
The invention has for its object to ~rovide a device of the kind set forth by which the disadvantages inherent in the conventional devices can be obviated in a simple manner.
According to the invention this can be achieved by arranging on either side of the belt at least one set of rollers so that between each set of rollers a peripheral part of the belt moves along an S-shaped bend and the angle between the centre line of a roller and the direction of length of the belt is adjustable.
By using the construction embodying the invention two sets of rollers engaging only the peripheral part of the belt permit steering the belt path as well as avoiding or removing rolds of the belt material without the need for exerting locally particularly heavy pincing forces on the belt.
The construction of the device can thus be simple and since undesirable load of the belt material is avoided, a long life-time of the belt is ensured.
In a preferred embodiment of the invention the two sets of rollers are pivotable about an axis or axes extending at least substantially at right angles to the main surface of the belt. By using this construction the device has a part-icularly simple structure in which the two sets of rollers can be intercoupled so that they can be commonly adjusted by a single adjusting member.
The invention will be described more fully hereinafter with reference to a few embodiments schematically shown in the accompanying Figures for the construction in accordance with the invention.
Fig. 1 is a schematic plan view of part of a belt with two rollers acting on said belt.
Fig. 2 is a side elevation of the belt of Fig. 1 in a first position of the rollers.
Fig. 3 is a side elevation of the belt of Fig. 1 in a second position of the rolelrs.
Fig. 4 is a schematic sectional view of an embodiment of a roller.
Fig. 5 schematically illustrates a potential support for two mutually co-operating rollers.
Fig. 1 schematically shows part of a belt 1, for example, a filter belt or endless conveyor belt guided along guide members (not shown in detail) such as rollers, drums or the like and being displaced in its direction of length indicated by the arrow A during operation. Near a side edge of the belt 1 two rollers 2 and 3 are arranged at a given distance from one another, viewed in the direction of dis-placement of the belt indicated by the arrow A. The roller 2 is disposed below and the roller 3 above the belt. Preferably a similar pair of rollers is provided on the other side of the belt. From the figures it will furthermore be apparent that in the embodiment shown the rotary axis or axes of the roller(s) is (are) at variable angles ~ 2 to the direction of length of the belt. During operation the rollers 2 and 3 are pressed with the aid of members not shown in detail in Figs. 1 to 3 against the belt surface so that the belt is guided to some extent through an S-shaped bend. By their frictional contact with the belt the rollers will exert a slightly out-wardly directed force on the belt as long as the angles ~1 and ~ 2 are somewhat smaller than 90 so that on the one hand the tendency of the belt to form folds is counteracted, since the rollers located on both sides of the belt tend to stretch the belt, and on the other hand the belt can be steered in a transverse direction by affecting the angles ~ so that the force on the belt is heavier near one side of the belt when 90 than near the other side when ~ = 90.
The signals required for the displacement of the roller 2 and/or of the roller 3 can be derived from the stretch and/or the direction of displacement of the belt 1 itself with the aid of members known per se.
Since the rollers 2 and 3 mutually co-operating for steering the belt are spaced apart by a given distance, the forces exerted on the belt for controlling the course of the belt, as compared with the constructions hitherto known, will attack a comparatively great length of the belt, whilst compression of the belt between relatively co-operating rollers is avoided, which will considerably enhance the life-time of the belt.
An efficaceuous embodiment of a roller is shown in Fig. 4. This Figure shows that a roller may comprise a cylindrical body 4 having grooves receiving O-rings 5 of rubber or a similar material so that these rings 5 extend beyond the outer surface of the cylindrical body 4. It is efficient to make the cylindrical body 4 from a synthetic resin, for example, polyethylene, polyamid or polypropylene.
It is found that the O-rings effectively co-operate with the belt to be acted upon.
Fig. 5 shows an effective embodiment of the support of two relatively co-operating rollers 2 and 3. It is shown in this Figure that the two rollers 2 and 3 are freely rotatable on shafts 6 and 7 respectively and arranged on a yoke 8. To the yoke 8 is fastened a shaft 9 extending perpendicular to the shafts 6 and 7 and being rotatably journalled about its centre line in a frame part (not shown) of the device. To the end of the shaft 9 remote from the york 8 is fastened an arm 10, the free end of which is engaged by a setting cylinder 11. The setting cylinder 11 can be actuated during operation by the signals derived from the stretch and/or direction of displacement of the belt in order to turn the yoke 8 about the centre line of the shaft 9 with the rollers 2 and 3 supported by the yoke 8.
It will be obvious that within the spirit and scope of the invention many variants of the embodiments described above and schematically shown in the accompanying Figures are possible.
For example the common adjustability of the mutually co-operating rollers 2 and 3 may be replaced by a relatively independent disposition so that they will be adjustable independently of one another. A further possibility resides in that one of the rollers is arranged in a fixed position, A
whereas the other roller alone is adjustable.
As a further alternative more than two rollers may be used in each set, at least one roller of a set being movable, whereas the belt zigzags along the rollers.
Moreover, viewed in the direction of the width of the belt more than two sets of rollers may be arranged one behind the other, some of which engage the peripheral parts of the belt, whereas others are disposed further to the centre of the belt. Preferably at least two sets of rollers of this plurality of sets will be commonly or individually pivotable. This has the advantage that the steering and tractive efforts are better distributed across the belt.
Furthermore, all rollers may be suspended in a single frame, which is pivotable about an axis at least substantially perpendicular to the direction of the belt.
~.
.
permitted for the de3ired optimum operation of the belt but such folds cannot be avoided when the aforesaid, known constructions are employed.
Besides, fron German Patent 2,304,37~ a device is known which comprises sets of rollers disposed so that the rotary axes of the rollers on one set are located in a plane at least .substantially at right angles to the belt material, whilst the belt can be pinced between the two rollers The rotary axes of the rollers are at an angle differing from 90 to the direction of length of the belt.
During operation the belt is clamped in between the rollers with a force depending on the stretch and~or the direction of displacement 1n of the belt-If, for example, a belt tends to deflect to a given side,a signal derived from the displacement of the belt will cause a decrease in clamping force exerted by the set of rollers on the side concerned I
and increase in clamping force of the set of rollers located on the oppo-1~ site side of the belt so that the latter set of rollers will drawthe belt back into the intended path of the belt. With the aforesaid inclined disposition of the rollers they can at the same time exert a spreading effecton the belt for eliminating any folds formed in the belt.
A disadvantage of the use of such pincing rollers is that 2~ fairly high local loads may occur in the belt, particularly when the edge of the belt is not completely flat, but provided, for example, with a turn-over. Particularly in the case of a belt having a turn-over thickness differences occur across the direction of length of the belt so that irregular local wear of the pincing rol]ers and/or of the rim of the belt itself is involved.
Viewed in the direction of length of the belt such pincing rollers al90 produce a locally heavy load, which give rise to disengagement of the rim,ravelling of the cloth and even to tear of the cloth in the longitudinal direction.
A furt~er disadvantage is that in eliminating lateral movements of the belt the pincing force of the rollers arranged on both sides of the belt is frequently fully suppressed so that locally no tractive force is any longer exerted on the belt, which may give rise to the formation of folds.
The invention has for its object to ~rovide a device of the kind set forth by which the disadvantages inherent in the conventional devices can be obviated in a simple manner.
According to the invention this can be achieved by arranging on either side of the belt at least one set of rollers so that between each set of rollers a peripheral part of the belt moves along an S-shaped bend and the angle between the centre line of a roller and the direction of length of the belt is adjustable.
By using the construction embodying the invention two sets of rollers engaging only the peripheral part of the belt permit steering the belt path as well as avoiding or removing rolds of the belt material without the need for exerting locally particularly heavy pincing forces on the belt.
The construction of the device can thus be simple and since undesirable load of the belt material is avoided, a long life-time of the belt is ensured.
In a preferred embodiment of the invention the two sets of rollers are pivotable about an axis or axes extending at least substantially at right angles to the main surface of the belt. By using this construction the device has a part-icularly simple structure in which the two sets of rollers can be intercoupled so that they can be commonly adjusted by a single adjusting member.
The invention will be described more fully hereinafter with reference to a few embodiments schematically shown in the accompanying Figures for the construction in accordance with the invention.
Fig. 1 is a schematic plan view of part of a belt with two rollers acting on said belt.
Fig. 2 is a side elevation of the belt of Fig. 1 in a first position of the rollers.
Fig. 3 is a side elevation of the belt of Fig. 1 in a second position of the rolelrs.
Fig. 4 is a schematic sectional view of an embodiment of a roller.
Fig. 5 schematically illustrates a potential support for two mutually co-operating rollers.
Fig. 1 schematically shows part of a belt 1, for example, a filter belt or endless conveyor belt guided along guide members (not shown in detail) such as rollers, drums or the like and being displaced in its direction of length indicated by the arrow A during operation. Near a side edge of the belt 1 two rollers 2 and 3 are arranged at a given distance from one another, viewed in the direction of dis-placement of the belt indicated by the arrow A. The roller 2 is disposed below and the roller 3 above the belt. Preferably a similar pair of rollers is provided on the other side of the belt. From the figures it will furthermore be apparent that in the embodiment shown the rotary axis or axes of the roller(s) is (are) at variable angles ~ 2 to the direction of length of the belt. During operation the rollers 2 and 3 are pressed with the aid of members not shown in detail in Figs. 1 to 3 against the belt surface so that the belt is guided to some extent through an S-shaped bend. By their frictional contact with the belt the rollers will exert a slightly out-wardly directed force on the belt as long as the angles ~1 and ~ 2 are somewhat smaller than 90 so that on the one hand the tendency of the belt to form folds is counteracted, since the rollers located on both sides of the belt tend to stretch the belt, and on the other hand the belt can be steered in a transverse direction by affecting the angles ~ so that the force on the belt is heavier near one side of the belt when 90 than near the other side when ~ = 90.
The signals required for the displacement of the roller 2 and/or of the roller 3 can be derived from the stretch and/or the direction of displacement of the belt 1 itself with the aid of members known per se.
Since the rollers 2 and 3 mutually co-operating for steering the belt are spaced apart by a given distance, the forces exerted on the belt for controlling the course of the belt, as compared with the constructions hitherto known, will attack a comparatively great length of the belt, whilst compression of the belt between relatively co-operating rollers is avoided, which will considerably enhance the life-time of the belt.
An efficaceuous embodiment of a roller is shown in Fig. 4. This Figure shows that a roller may comprise a cylindrical body 4 having grooves receiving O-rings 5 of rubber or a similar material so that these rings 5 extend beyond the outer surface of the cylindrical body 4. It is efficient to make the cylindrical body 4 from a synthetic resin, for example, polyethylene, polyamid or polypropylene.
It is found that the O-rings effectively co-operate with the belt to be acted upon.
Fig. 5 shows an effective embodiment of the support of two relatively co-operating rollers 2 and 3. It is shown in this Figure that the two rollers 2 and 3 are freely rotatable on shafts 6 and 7 respectively and arranged on a yoke 8. To the yoke 8 is fastened a shaft 9 extending perpendicular to the shafts 6 and 7 and being rotatably journalled about its centre line in a frame part (not shown) of the device. To the end of the shaft 9 remote from the york 8 is fastened an arm 10, the free end of which is engaged by a setting cylinder 11. The setting cylinder 11 can be actuated during operation by the signals derived from the stretch and/or direction of displacement of the belt in order to turn the yoke 8 about the centre line of the shaft 9 with the rollers 2 and 3 supported by the yoke 8.
It will be obvious that within the spirit and scope of the invention many variants of the embodiments described above and schematically shown in the accompanying Figures are possible.
For example the common adjustability of the mutually co-operating rollers 2 and 3 may be replaced by a relatively independent disposition so that they will be adjustable independently of one another. A further possibility resides in that one of the rollers is arranged in a fixed position, A
whereas the other roller alone is adjustable.
As a further alternative more than two rollers may be used in each set, at least one roller of a set being movable, whereas the belt zigzags along the rollers.
Moreover, viewed in the direction of the width of the belt more than two sets of rollers may be arranged one behind the other, some of which engage the peripheral parts of the belt, whereas others are disposed further to the centre of the belt. Preferably at least two sets of rollers of this plurality of sets will be commonly or individually pivotable. This has the advantage that the steering and tractive efforts are better distributed across the belt.
Furthermore, all rollers may be suspended in a single frame, which is pivotable about an axis at least substantially perpendicular to the direction of the belt.
~.
Claims (5)
1. A device for influencing stretching and direction of displacement of a belt moving in its direction of length during operation, comprising at least one set of rollers, one of which extends above and the other below the belt, at least one of them being displaceable with respect to the belt under the action of signals derived from the stretch and the direction of displacement of the belt, whilst viewed in the direction of displacement of the belt the two rollers of said set are located one behind the other, characterised in that at least one set of rollers is arranged on either side of the belt in a manner such that between each set of rollers a peripheral part of the belt moves along an S-shaped bend and the angle between the centre line of a roller and the direction of length of the belt is adjustable.
2. A device as claimed in claim 1 characterised in that a roller is pivotable about an axis crossing the centre line of the roller.
3. A device as claimed in claim 5, characterised in that the two rollers of each set are each pivotable about an axis at least substantially perpendicular to the main surface of the belt.
4. A device as claimed in claim 1, 2 or 3 characterised in that each set of rollers is supported by a yoke pivotable about a shaft which is at an angle to the rotary axes of the rollers.
5. A device as claimed in claim 1, 2 or 3 characterised in that a plurality of relatively spaced O-rings or a similar material are arranged on the outer periphery of a roller.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL8004446 | 1980-08-05 | ||
| NL8004446A NL8004446A (en) | 1980-08-05 | 1980-08-05 | Apparatus for influencing the extension and / or displacement direction of a tire. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1155784A true CA1155784A (en) | 1983-10-25 |
Family
ID=19835707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000382466A Expired CA1155784A (en) | 1980-08-05 | 1981-07-24 | Device for influencing stretching and direction of displacement of a belt moving in its direction of the length during operation |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0045540A1 (en) |
| AU (1) | AU7319981A (en) |
| CA (1) | CA1155784A (en) |
| NL (1) | NL8004446A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4629062A (en) * | 1983-08-29 | 1986-12-16 | A. D. Smith Harvestore Products, Inc. | Belt trainer apparatus for a conveyor |
| EP0417363B1 (en) * | 1989-09-15 | 1992-10-14 | Kabushiki Kaisha Iseki Kaihatsu Koki | Vertical type conveyor |
| US5050727A (en) * | 1989-10-12 | 1991-09-24 | Kabushikikaisha Isekikaihatsu Koki | Conveying method and conveyor apparatus |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3156396A (en) * | 1962-10-08 | 1964-11-10 | Ind Ovens Inc | Web guiding means |
-
1980
- 1980-08-05 NL NL8004446A patent/NL8004446A/en not_active Application Discontinuation
-
1981
- 1981-07-15 EP EP81200812A patent/EP0045540A1/en not_active Withdrawn
- 1981-07-22 AU AU73199/81A patent/AU7319981A/en not_active Abandoned
- 1981-07-24 CA CA000382466A patent/CA1155784A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| AU7319981A (en) | 1982-02-11 |
| EP0045540A1 (en) | 1982-02-10 |
| NL8004446A (en) | 1982-03-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2191310C (en) | Apparatus for continuously stretching or continuously releasing stretching forces from a web using two pairs of opposing non-planar belts | |
| US3786975A (en) | Apparatus for broad-drawing sheet materials | |
| US4811833A (en) | Wiper apparatus for conveyor belt | |
| CA2270550A1 (en) | A device for steering a conveyor belt | |
| CA1155784A (en) | Device for influencing stretching and direction of displacement of a belt moving in its direction of the length during operation | |
| JPH0578919A (en) | Card having moving flat composed of flat bar with card clothing | |
| CA1256046A (en) | Material conveyor and distribution system | |
| WO1992021799A1 (en) | Spreading and laying machine | |
| KR890014395A (en) | Continuous dewatering method and continuous dewatering device such as sludge, excess body and their processing residue | |
| ATE54289T1 (en) | MACHINE FOR PICKING AND STACKING CUT SHEETS. | |
| CS206785A2 (en) | Dvoupasovy lis | |
| AU682973B2 (en) | Turning device for conveyor belt | |
| US5340008A (en) | Fabric conveyor system | |
| CA2482316A1 (en) | Web tension equalizing roll and tracking apparatus | |
| CA1121210A (en) | Apparatus for dewatering material with high water content | |
| US5205399A (en) | Conveyor belt return training device | |
| US4697311A (en) | Apparatus for the manufacture of a nonwoven fabric | |
| CA1058548A (en) | Endless belt conveyor | |
| ES2007193A6 (en) | Press | |
| AU772441B2 (en) | Tracking of belts and webs | |
| JPH0739843Y2 (en) | Twist roller for pipe conveyor wear prevention | |
| RU1798293C (en) | Conveyer band centering device | |
| GB2322388A (en) | Spreading cloth | |
| SU1210680A1 (en) | Rolling device | |
| JPH0438954Y2 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |